CMakeLists.txt: remove MYSQL_SOURCE_DIR from MYSQL_INCLUDE_DIRS

Author: danielnachun

storage/mroonga/CMakeLists.txt

@@ -219,8 +219,7 @@ set(MYSQL_INCLUDE_DIRS
   "${MYSQL_REGEX_INCLUDE_DIR}"
   "${MYSQL_RAPIDJSON_INCLUDE_DIR}"
   "${MYSQL_LIBBINLOGEVENTS_EXPORT_DIR}"
-  "${MYSQL_LIBBINLOGEVENTS_INCLUDE_DIR}"
-  "${MYSQL_SOURCE_DIR}")
+  "${MYSQL_LIBBINLOGEVENTS_INCLUDE_DIR}")
 
 if(MRN_BUNDLED)
   set(MYSQL_PLUGIN_DIR "${INSTALL_PLUGINDIR}")