Re-enabled all polling engines for LB tests

build.yaml

@@ -3877,10 +3877,6 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-  excluded_poll_engines:
-  - poll
-  - poll-cv
-  - epollex
 - name: codegen_test_full
   gtest: true
   build: test
@@ -4169,9 +4165,6 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-  excluded_poll_engines:
-  - poll
-  - poll-cv
 - name: grpclb_test
   gtest: false
   build: test
@@ -4186,10 +4179,6 @@ targets:
   - grpc
   - gpr_test_util
   - gpr
-  excluded_poll_engines:
-  - poll
-  - poll-cv
-  - epollex
 - name: h2_ssl_cert_test
   gtest: true
   build: test

tools/run_tests/generated/tests.json

@@ -3425,11 +3425,6 @@
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "exclude_iomgrs": [], 
-    "excluded_poll_engines": [
-      "poll", 
-      "poll-cv", 
-      "epollex"
-    ], 
     "flaky": false, 
     "gtest": true, 
     "language": "c++", 
@@ -3792,10 +3787,6 @@
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "exclude_iomgrs": [], 
-    "excluded_poll_engines": [
-      "poll", 
-      "poll-cv"
-    ], 
     "flaky": false, 
     "gtest": true, 
     "language": "c++", 
@@ -3820,11 +3811,6 @@
     "cpu_cost": 1.0, 
     "exclude_configs": [], 
     "exclude_iomgrs": [], 
-    "excluded_poll_engines": [
-      "poll", 
-      "poll-cv", 
-      "epollex"
-    ], 
     "flaky": false, 
     "gtest": false, 
     "language": "c++",