Remove 'x-symfony-controller' specification extension support #167

Job	Run time
Composer lockfile integrity	20s
Code standards	12s
Tests (Symfony 4.4 & PHP 7.4)	24s
Tests (Symfony 5.0 & PHP 7.4)	32s
Tests (Symfony 5.1 & PHP 7.4)	29s
Tests (Symfony 5.2 & PHP 7.4)	42s
Tests (Symfony 5.3 & PHP 7.4)	27s
Tests (Symfony 5.4 & PHP 7.4)	27s
Tests (Symfony 4.4 & PHP 8.0)	21s
Tests (Symfony 5.1 & PHP 8.0)	31s
Tests (Symfony 5.2 & PHP 8.0)	19s
Tests (Symfony 5.3 & PHP 8.0)	30s
Tests (Symfony 5.4 & PHP 8.0)	21s
Tests (Symfony 6.0 & PHP 8.0)	25s
Tests (Symfony 4.4 & PHP 8.1)	23s
Tests (Symfony 5.3 & PHP 8.1)	32s
Tests (Symfony 5.4 & PHP 8.1)	30s
Tests (Symfony 6.0 & PHP 8.1)	26s
Tests (Symfony 6.1 & PHP 8.1)	25s
Tests (Symfony 6.2 & PHP 8.1)	25s
Tests (Symfony 6.3 & PHP 8.1)	34s
Tests (Symfony 6.4 & PHP 8.1)	20s
Tests (Symfony 4.4 & PHP 8.2)	30s
Tests (Symfony 5.3 & PHP 8.2)	23s
Tests (Symfony 5.4 & PHP 8.2)	59s
Tests (Symfony 6.0 & PHP 8.2)	36s
Tests (Symfony 6.1 & PHP 8.2)	22s
Tests (Symfony 6.2 & PHP 8.2)	35s
Tests (Symfony 6.3 & PHP 8.2)	28s
Tests (Symfony 6.4 & PHP 8.2)	38s
Tests (Symfony 4.4 & PHP 8.3)	20s
Tests (Symfony 5.3 & PHP 8.3)	31s
Tests (Symfony 5.4 & PHP 8.3)	44s
Tests (Symfony 6.0 & PHP 8.3)	20s
Tests (Symfony 6.1 & PHP 8.3)	20s
Tests (Symfony 6.2 & PHP 8.3)	21s
Tests (Symfony 6.3 & PHP 8.3)	27s
Tests (Symfony 6.4 & PHP 8.3)	25s
Tests (Symfony 5.4 & PHP 8.1)	31s
	18m 5s

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