test-assert-subroutine-error-termination: Remove check-exit-status from flang case

This helper executable is unnecessary and exacerbates flag-inheritance
problems by adding extraneous recursive fpm calls

Author: bonachea

test/run-false-assertion.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 output=$(fpm run --example false-assertion --compiler flang-new --flag '-mmlir -allow-assumed-rank -O3 -DASSERTIONS' > /dev/null 2>&1)
-echo $?
+echo $? > build/exit_status

test/test-assert-subroutine-error-termination.F90

@@ -21,7 +21,7 @@ program test_assert_subroutine_error_termination
 #elif NAGFOR
     command = "fpm run --example false-assertion --compiler nagfor --flag '-DASSERTIONS -fpp' > /dev/null 2>&1", &
 #elif __flang__
-    command = "./test/run-false-assertion.sh | fpm run --example check-exit-status", &
+    command = "./test/run-false-assertion.sh", &
 #elif __INTEL_COMPILER
     command = "./test/run-false-assertion-intel.sh | fpm run --example check-exit-status", &
 #elif _CRAYFTN