ProcessorCallContext: remove unused method getClass() #673

Job	Run time
Tests (ubuntu-latest, 7.4, false)	23s
Static analysis (ubuntu-latest, 8.4)	26s
Coding standard (ubuntu-latest, 8.4)	19s
Test for mutants (ubuntu-latest, 8.4)	2m 35s
Tests (ubuntu-latest, 8.0, false)	36s
Tests (ubuntu-latest, 8.1, false)	25s
Tests (ubuntu-latest, 8.2, false)	33s
Tests (ubuntu-latest, 8.3, false)	38s
Tests (ubuntu-latest, 8.4, false)	26s
Tests (ubuntu-latest, 7.4, --prefer-lowest --prefer-stable, false)	28s
Tests (ubuntu-latest, 8.4, --ignore-platform-req=php+, true)	26s
Tests (macos-latest, 8.4, false)	1m 47s
Tests (windows-latest, 8.4, false)	1m 18s
Code coverage finish (ubuntu-latest, 8.4)	2s
Status check - CI	3s
	10m 25s

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