Add new CatchBlockRemoval mutator

[sidz]

This PR:

• Adds new CatchBlockRemoval mutator
• Covered by tests
• Doc PR: Update mutators.md with CatchBlockRemoval mutator site#246

try {
    $callback();
- } catch (\DomainException $ex) {
-     $logger->log($ex);
} catch (\LogicException $e) {
    throw $e;
}

It won't remove catch block in case there is no statements

<?php

try {
    $callback();
} catch (\DomainException $e) {
    // DO nothing
- } catch (\Throwable $e) {
-     throw new \RuntimeException();
}

[maks-rafalko]

Nice! Can't believe we didn't have such mutator so far.

Please update the docs as well.

[sidz]

Done