Remove special case for strings in pydevd_sys_monitoring #991

Job	Run time
build (ubuntu-pypy3)	7m 14s
build (ubuntu-py38-cython-checkbin)	11m 29s
build (windows-py39-cython)	9m 0s
build (windows-py310-cython-checkbin)	10m 23s
build (windows-py311-cython)	8m 5s
build (ubuntu-py311-cython)	8m 10s
build (ubuntu-py312-cython-checkbin)	11m 23s
build (windows-py312-cython-checkbin)	8m 6s
build (ubuntu-py313-cython)	8m 18s
build (windows-py313-cython)	8m 48s
	1h 30m 56s

Provide feedback