Remove @nullable from code

Author: mhalbritter

initializr-generator/src/main/java/io/spring/initializr/generator/language/ClassName.java

@@ -21,7 +21,6 @@
 
 import javax.lang.model.SourceVersion;
 
-import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 
 /**
@@ -177,7 +176,7 @@ private static void buildName(ClassName className, StringBuilder sb) {
 	}
 
 	@Override
-	public boolean equals(@Nullable Object other) {
+	public boolean equals(Object other) {
 		if (this == other) {
 			return true;
 		}