Java: Look for redundant assignment of a field in class and field initializers (IDEA-149587)

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

@@ -0,0 +1,7 @@
+// "Remove redundant assignment" "true"
+class A {
+  static int n;
+  static {
+  }
+  static { n = 2; }
+}

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

@@ -0,0 +1,5 @@
+// "Remove redundant initializer" "true"
+class A {
+  int n;
+  { n = 1; }
+}

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

@@ -0,0 +1,6 @@
+// "Remove redundant assignment" "true"
+class A {
+  static int n;
+  static { <caret>n = 1; }
+  static { n = 2; }
+}

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

@@ -0,0 +1,5 @@
+// "Remove redundant initializer" "true"
+class A {
+  int n = <caret>0;
+  { n = 1; }
+}