Remove un-needed code

go/ql/lib/semmle/go/frameworks/GoMicro.qll

@@ -27,12 +27,7 @@ module GoMicro {
    * A file that is generated by the protobuf compiler.
    */
   class ProtocGeneratedFile extends File {
-    ProtocGeneratedFile() {
-      exists(string prefix, File f |
-        prefix = this.getBaseName().regexpCapture("^(.*)\\.pb(\\.micro)?\\.go$", 1) and
-        this.getParentContainer() = f.getParentContainer()
-      )
-    }
+    ProtocGeneratedFile() { this.getBaseName().regexpMatch(".*\\.pb(\\.micro)?\\.go$") }
   }
 
   /**