No longer need test discovery command line. (#2717)

Motivation:

Command line argument has not been needed for several swift version.

Modifications:

This causes warnings in recent swift versions.

Result:

No more warnings about swift command line when testing

docker/docker-compose.2204.510.yaml

@@ -70,7 +70,6 @@ services:
  - MAX_ALLOCS_ALLOWED_scheduling_10000_executions=89
  - MAX_ALLOCS_ALLOWED_udp_1000_reqs_1_conn=6200
  - MAX_ALLOCS_ALLOWED_udp_1_reqs_1000_conn=165050
- - FORCE_TEST_DISCOVERY=--enable-test-discovery
  - WARN_AS_ERROR_ARG=-Xswiftc -warnings-as-errors
  - IMPORT_CHECK_ARG=--explicit-target-dependency-import-check error
  # - SANITIZER_ARG=--sanitize=thread # TSan broken still

docker/docker-compose.2204.58.yaml

@@ -70,7 +70,6 @@ services:
  - MAX_ALLOCS_ALLOWED_scheduling_10000_executions=89
  - MAX_ALLOCS_ALLOWED_udp_1000_reqs_1_conn=6200
  - MAX_ALLOCS_ALLOWED_udp_1_reqs_1000_conn=165050
- - FORCE_TEST_DISCOVERY=--enable-test-discovery
  - WARN_AS_ERROR_ARG=-Xswiftc -warnings-as-errors
  - IMPORT_CHECK_ARG=--explicit-target-dependency-import-check error
  # - SANITIZER_ARG=--sanitize=thread # TSan broken still

docker/docker-compose.2204.59.yaml

@@ -70,7 +70,6 @@ services:
  - MAX_ALLOCS_ALLOWED_scheduling_10000_executions=89
  - MAX_ALLOCS_ALLOWED_udp_1000_reqs_1_conn=6200
  - MAX_ALLOCS_ALLOWED_udp_1_reqs_1000_conn=165050
- - FORCE_TEST_DISCOVERY=--enable-test-discovery
  - WARN_AS_ERROR_ARG=-Xswiftc -warnings-as-errors
  - IMPORT_CHECK_ARG=--explicit-target-dependency-import-check error
  # - SANITIZER_ARG=--sanitize=thread # TSan broken still

docker/docker-compose.2204.main.yaml

@@ -69,7 +69,6 @@ services:
  - MAX_ALLOCS_ALLOWED_scheduling_10000_executions=89
  - MAX_ALLOCS_ALLOWED_udp_1000_reqs_1_conn=6200
  - MAX_ALLOCS_ALLOWED_udp_1_reqs_1000_conn=165050
- - FORCE_TEST_DISCOVERY=--enable-test-discovery
  - WARN_AS_ERROR_ARG=-Xswiftc -warnings-as-errors
  - IMPORT_CHECK_ARG=--explicit-target-dependency-import-check error
  # - SANITIZER_ARG=--sanitize=thread # TSan broken still

docker/docker-compose.yaml

@@ -28,7 +28,7 @@ services:
 
  unit-tests:
  <<: *common
- command: /bin/bash -xcl "swift $${SWIFT_TEST_VERB-test} $${FORCE_TEST_DISCOVERY-} $${WARN_AS_ERROR_ARG-} $${IMPORT_CHECK_ARG-}"
+ command: /bin/bash -xcl "swift $${SWIFT_TEST_VERB-test} $${WARN_AS_ERROR_ARG-} $${IMPORT_CHECK_ARG-}"
 
  integration-tests:
  <<: *common
@@ -40,7 +40,7 @@ services:
 
  test:
  <<: *common
- command: /bin/bash -xcl "uname -a && swift -version && swift $${SWIFT_TEST_VERB-test} $${FORCE_TEST_DISCOVERY-} $${WARN_AS_ERROR_ARG-} $${SANITIZER_ARG-} $${IMPORT_CHECK_ARG-} && ./scripts/integration_tests.sh $${INTEGRATION_TESTS_ARG-} && cd Benchmarks && swift package benchmark baseline check --check-absolute-path Thresholds/$${SWIFT_VERSION-}/"
+ command: /bin/bash -xcl "uname -a && swift -version && swift $${SWIFT_TEST_VERB-test} $${WARN_AS_ERROR_ARG-} $${SANITIZER_ARG-} $${IMPORT_CHECK_ARG-} && ./scripts/integration_tests.sh $${INTEGRATION_TESTS_ARG-} && cd Benchmarks && swift package benchmark baseline check --check-absolute-path Thresholds/$${SWIFT_VERSION-}/"
 
  performance-test:
  <<: *common