diff --git a/src/kudu/gutil/walltime.cc b/src/kudu/gutil/walltime.cc
index c577191..e9afe78 100644
--- a/src/kudu/gutil/walltime.cc
+++ b/src/kudu/gutil/walltime.cc
@@ -26,9 +26,6 @@
 
 #include "kudu/gutil/walltime.h"
 
-#include <stdio.h>
-#include <string.h>
-
 #if defined(__APPLE__)
 #include <mach/clock.h>
 #include <mach/mach.h>
@@ -47,16 +44,6 @@
 } // namespace walltime_internal
 #endif
 
-// This is exactly like mktime() except it is guaranteed to return -1 on
-// failure.  Some versions of glibc allow mktime() to return negative
-// values which the standard says are undefined.  See the standard at
-// http://www.opengroup.org/onlinepubs/007904875/basedefs/xbd_chap04.html
-// under the heading "Seconds Since the Epoch".
-static inline time_t gmktime(struct tm *tm) {
-  time_t rt = mktime(tm);
-  return rt < 0 ? time_t(-1) : rt;
-}
-
 static void StringAppendStrftime(std::string* dst,
                                  const char* format,
                                  const struct tm* tm) {
@@ -90,87 +77,6 @@
   return;
 }
 
-// Convert a "struct tm" interpreted as *GMT* into a time_t (technically
-// a long since we can't include header files in header files bla bla bla).
-// This is basically filling a hole in the standard library.
-//
-// There are several approaches to mkgmtime() implementation on the net,
-// many of them wrong.  Simply reimplementing the logic seems to be the
-// simplest and most efficient, though it does reimplement calendar logic.
-// The calculation is mostly straightforward; leap years are the main issue.
-//
-// Like gmktime() this method returns -1 on failure. Negative results
-// are considered undefined by the standard so these cases are
-// considered failures and thus return -1.
-time_t mkgmtime(const struct tm *tm) {
-  // Month-to-day offset for non-leap-years.
-  static const int month_day[12] =
-    {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
-
-  // Most of the calculation is easy; leap years are the main difficulty.
-  int month = tm->tm_mon % 12;
-  int year = tm->tm_year + tm->tm_mon / 12;
-  if (month < 0) {   // Negative values % 12 are still negative.
-    month += 12;
-    --year;
-  }
-
-  // This is the number of Februaries since 1900.
-  const int year_for_leap = (month > 1) ? year + 1 : year;
-
-  time_t rt = tm->tm_sec                           // Seconds
-       + 60 * (tm->tm_min                          // Minute = 60 seconds
-       + 60 * (tm->tm_hour                         // Hour = 60 minutes
-       + 24 * (month_day[month] + tm->tm_mday - 1  // Day = 24 hours
-       + 365 * (year - 70)                         // Year = 365 days
-       + (year_for_leap - 69) / 4                  // Every 4 years is leap...
-       - (year_for_leap - 1) / 100                 // Except centuries...
-       + (year_for_leap + 299) / 400)));           // Except 400s.
-  return rt < 0 ? -1 : rt;
-}
-
-bool WallTime_Parse_Timezone(const char* time_spec,
-                             const char* format,
-                             const struct tm* default_time,
-                             bool local,
-                             WallTime* result) {
-  struct tm split_time;
-  if (default_time) {
-     split_time = *default_time;
-  } else {
-     memset(&split_time, 0, sizeof(split_time));
-  }
-  const char* parsed = strptime(time_spec, format, &split_time);
-  if (parsed == nullptr) return false;
-
-  // If format ends with "%S", match fractional seconds
-  double fraction = 0.0;
-  char junk;
-  if ((*parsed == '.') &&
-     (strcmp(format + strlen(format) - 2, "%S") == 0) &&
-     (sscanf(parsed, "%lf%c",  // NOLINT(runtime/printf)
-             &fraction, &junk) == 1)) {
-     parsed = format + strlen(format);   // Parsed it all!
-  }
-  if (*parsed != '\0') return false;
-
-  // Convert into seconds since epoch.  Adjust so it is interpreted
-  // w.r.t. the daylight-saving-state at the specified time.
-  split_time.tm_isdst = -1;     // Ask gmktime() to find dst imfo
-  time_t ptime;
-  if (local) {
-    ptime = gmktime(&split_time);
-  } else {
-    ptime = mkgmtime(&split_time);  // Returns time in GMT instead of local.
-  }
-
-  if (ptime == -1) return false;
-
-  *result = ptime;
-  *result += fraction;
-  return true;
-}
-
 WallTime WallTime_Now() {
 #if defined(__APPLE__)
   mach_timespec_t ts;
diff --git a/src/kudu/gutil/walltime.h b/src/kudu/gutil/walltime.h
index 1850973..93a9536 100644
--- a/src/kudu/gutil/walltime.h
+++ b/src/kudu/gutil/walltime.h
@@ -16,10 +16,7 @@
 // KIND, either express or implied.  See the License for the
 // specific language governing permissions and limitations
 // under the License.
-#ifndef GUTIL_WALLTIME_H_
-#define GUTIL_WALLTIME_H_
-
-#include <sys/time.h>
+#pragma once
 
 #include <ctime>
 #include <string>
@@ -52,16 +49,6 @@
 // Return the local time as a string suitable for user display.
 std::string LocalTimeAsString();
 
-// Similar to the WallTime_Parse, but it takes a boolean flag local as
-// argument specifying if the time_spec is in local time or UTC
-// time. If local is set to true, the same exact result as
-// WallTime_Parse is returned.
-bool WallTime_Parse_Timezone(const char* time_spec,
-                             const char* format,
-                             const struct tm* default_time,
-                             bool local,
-                             WallTime* result);
-
 // Return current time in seconds as a WallTime.
 WallTime WallTime_Now();
 
@@ -213,4 +200,3 @@
 
 // inline method bodies
 #include "kudu/gutil/cycleclock-inl.h"  // IWYU pragma: export
-#endif  // GUTIL_WALLTIME_H_