ci: remove block step from buildkite script

The block-if-not-maintainer step should not be part of the generated
pipeline, as someone might open a PR which removes it (exactly as this
commit does) and, even worse, launch arbitrary stuff on our CI.

I have already added the block step on buildkite pipeline directly, so
this commit just removes the superfluous block step.

Signed-off-by: Babis Chalios <bchalios@amazon.es>

Author: bchalios

.buildkite/pipeline_pr.py

@@ -47,11 +47,6 @@ def group(group_name, command, agent_tags=None, priority=0, timeout=30):
     return {"group": group_name, "steps": steps}
 
 
-step_block_unless_maintainer = {
-    "block": "Waiting for approval to run",
-    "if": '(build.creator.teams includes "prod-compute-capsule") == false',
-}
-
 step_style = {
     "command": "./tools/devtool -y test -- ../tests/integration_tests/style/",
     "label": "🪶 Style",
@@ -93,7 +88,6 @@ def group(group_name, command, agent_tags=None, priority=0, timeout=30):
 pipeline = {
     "agents": {"queue": "default"},
     "steps": [
-        step_block_unless_maintainer,
         step_style,
         build_grp,
         functional_1_grp,