Remove seemingly broken YCM option

.ycm_extra_conf.py

@@ -28,7 +28,7 @@
 #
 # Most projects will NOT need to set this to anything; you can just change the
 # 'flags' list of compilation flags. Notice that YCM itself uses that approach.
-compilation_database_folder = 'build'
+compilation_database_folder = ''
 
 if os.path.exists( compilation_database_folder ):
   database = ycm_core.CompilationDatabase( compilation_database_folder )