Fix linter issues.

Author: aardvark179

src/main/java/org/truffleruby/interop/OutgoingForeignCallNode.java

@@ -14,7 +14,6 @@
 import org.truffleruby.RubyContext;
 import org.truffleruby.RubyLanguage;
 import org.truffleruby.core.array.ArrayUtils;
-import org.truffleruby.core.symbol.RubySymbol;
 import org.truffleruby.language.RubyBaseNode;
 import org.truffleruby.language.control.RaiseException;
 import org.truffleruby.language.dispatch.CallDispatchHeadNode;

src/main/java/org/truffleruby/interop/ProxyForeignObject.java

@@ -9,8 +9,6 @@
  */
 package org.truffleruby.interop;
 
-import java.lang.reflect.Executable;
-
 import com.oracle.truffle.api.dsl.Cached;
 import com.oracle.truffle.api.interop.InteropLibrary;
 import com.oracle.truffle.api.interop.TruffleObject;
@@ -49,7 +47,7 @@ protected Object send(Message message, Object[] rawArgs,
         if (logger != null) {
             Object[] args;
             if (message == EXECUTABLE || message == INSTANTIATE) {
-                args = (Object[])rawArgs[0];
+                args = (Object[]) rawArgs[0];
             } else if (message == INVOKE) {
                 Object[] invokeArgs = (Object[]) rawArgs[1];
                 args = new Object[invokeArgs.length + 1];