Remove -sMIN_CHROME_VERSION=58 from test_minimal_runtime_code_size. NFC (#19793)

This test is designed to verify the minimum code size so I can't see
why we would want to enable support for an older browser here
(potentially triggering the inclusion of polyfills).

This was added #9919 but its not clear to me why.

Author: sbc100

test/test_other.py

@@ -10090,7 +10090,6 @@ def test_minimal_runtime_code_size(self, test_name, js, compare_js_output=False)
                                '-sGL_TRACK_ERRORS=0',
                                '-sGL_SUPPORT_EXPLICIT_SWAP_CONTROL=0',
                                '-sGL_POOL_TEMP_BUFFERS=0',
-                               '-sMIN_CHROME_VERSION=58',
                                '-sGL_WORKAROUND_SAFARI_GETCONTEXT_BUG=0',
                                '-sNO_FILESYSTEM',
                                '-sSTRICT',