Drop files Windows doesn't like.

There are potential workarounds (spare checkouts) but this creates too
much hassle for developers on Windows compared to the benefits these
files bring.
diff --git "a/test/webapp/bug66609/c\"c.txt" "b/test/webapp/bug66609/c\"c.txt"
deleted file mode 100644
index a0aba93..0000000
--- "a/test/webapp/bug66609/c\"c.txt"
+++ /dev/null
@@ -1 +0,0 @@
-OK
\ No newline at end of file
diff --git "a/test/webapp/bug66609/d\074d.txt" "b/test/webapp/bug66609/d\074d.txt"
deleted file mode 100644
index a0aba93..0000000
--- "a/test/webapp/bug66609/d\074d.txt"
+++ /dev/null
@@ -1 +0,0 @@
-OK
\ No newline at end of file
diff --git "a/test/webapp/bug66609/e\076e.txt" "b/test/webapp/bug66609/e\076e.txt"
deleted file mode 100644
index a0aba93..0000000
--- "a/test/webapp/bug66609/e\076e.txt"
+++ /dev/null
@@ -1 +0,0 @@
-OK
\ No newline at end of file