New refactoring - Remove unneeded type parameters

[JnRouvignac]

Given

The following code:

    public String removeThisAndUselessTypeParameter() {
        return this.<Class> notGenericMethod();
    }

    private String notGenericMethod() {
        return null;
    }

When

...automated refactorings are applied...

Then

Code should be refactored to:

    public String removeThisAndUselessTypeParameter() {
        return this.notGenericMethod();
    }

    private String notGenericMethod() {
        return null;
    }

[JnRouvignac]

This should work with one or several uneeded type parameters. This should also work with method invocation, super method invocation, ... (others?)

[JnRouvignac]

See commit 1ec7b78850a9dc9213f539a69e497be1b273f5cb for an inspiration on the JDT APIs to use to solve this bug.