Remove setenvs when running boringssl_self_test.

No longer needed as the code to generate flag files based on
this environment variable is removed in Android 13.

Bug: 231946889
Test: Build and boot,
Change-Id: I8ce57619aa4d1e6457f3f864bf5e403f727c040c
(cherry picked from commit ba830eb81b57f3a1e7be74978d435721b7724e46)
Merged-In: I8ce57619aa4d1e6457f3f864bf5e403f727c040c
1 file changed