remove useless logback.xml
diff --git a/dubbo-fst-client/src/main/resources/logback.xml b/dubbo-fst-client/src/main/resources/logback.xml
deleted file mode 100644
index a9b8f56..0000000
--- a/dubbo-fst-client/src/main/resources/logback.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<configuration>
-    <jmxConfigurator/>
-
-    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
-        <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
-            </pattern>
-        </encoder>
-    </appender>
-
-    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
-        <file>logs/dubbo-fst-client.log</file>
-        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
-            <fileNamePattern>logs/dubbo-fst-client.%d{yyyy-MM-dd}.log.gz</fileNamePattern>
-        </rollingPolicy>
-        <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n </pattern>
-        </encoder>
-    </appender>
-
-    <root level="DEBUG">
-         <appender-ref ref="CONSOLE" />
-        <appender-ref ref="FILE"/>
-    </root>
-</configuration>
diff --git a/dubbo-hessianlite-client/src/main/resources/logback.xml b/dubbo-hessianlite-client/src/main/resources/logback.xml
deleted file mode 100644
index cf75589..0000000
--- a/dubbo-hessianlite-client/src/main/resources/logback.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<configuration>
-    <jmxConfigurator/>
-
-    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
-        <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
-            </pattern>
-        </encoder>
-    </appender>
-
-    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
-        <file>logs/dubbo-hessianlite-client.log</file>
-        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
-            <fileNamePattern>logs/dubbo-hessianlite-client.%d{yyyy-MM-dd}.log.gz</fileNamePattern>
-        </rollingPolicy>
-        <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
-        </encoder>
-    </appender>
-
-    <root level="INFO">
-        <appender-ref ref="CONSOLE"/>
-        <appender-ref ref="FILE"/>
-    </root>
-</configuration>
diff --git a/dubbo-kryo-client/src/main/resources/logback.xml b/dubbo-kryo-client/src/main/resources/logback.xml
deleted file mode 100644
index 359128e..0000000
--- a/dubbo-kryo-client/src/main/resources/logback.xml
+++ /dev/null
@@ -1,26 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<configuration>
-    <jmxConfigurator/>
-
-    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
-        <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
-            </pattern>
-        </encoder>
-    </appender>
-
-    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
-        <file>logs/dubbo-kyro-client.log</file>
-        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
-            <fileNamePattern>logs/dubbo-kryo-client.%d{yyyy-MM-dd}.log.gz</fileNamePattern>
-        </rollingPolicy>
-        <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n </pattern>
-        </encoder>
-    </appender>
-
-    <root level="INFO">
-         <appender-ref ref="CONSOLE" />
-        <appender-ref ref="FILE"/>
-    </root>
-</configuration>