remove unused files

.idea/libraries/Go_SDK.xml

@@ -1,10 +0,0 @@
-<component name="libraryTable">
-  <library name="Go SDK">
-    <CLASSES>
-      <root url="file:///usr/local/go/src" />
-    </CLASSES>
-    <SOURCES>
-      <root url="file:///usr/local/go/src" />
-    </SOURCES>
-  </library>
-</component>