provide remove assignment fix for silly assignment inspection (IDEA-125993)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/unusedAssignment/afterSillyAssignment.java

@@ -0,0 +1,7 @@
+// "Remove redundant assignment" "true"
+class A {
+  {
+    String ss = "";
+
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/unusedAssignment/beforeSillyAssignment.java

@@ -0,0 +1,8 @@
+// "Remove redundant assignment" "true"
+class A {
+  {
+    String ss = "";
+
+    s<caret>s = ss;
+  }
+}