chore(ci): remove parallelism

.drone.yml

@@ -109,8 +109,6 @@ steps:
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - mix compile --all-warnings --warnings-as-errors
-    depends_on:
-      - 'restore cache'
 
   - name: audit deps
     image: *elixir
@@ -120,40 +118,30 @@ steps:
       - mix deps.audit
       - mix deps.unlock --check-unused
       # - mix hex.outdated
-    depends_on:
-      - 'restore cache'
 
   - name: format check
     image: *elixir
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - mix format --dry-run --check-formatted
-    depends_on:
-      - 'restore cache'
 
   - name: credo check
     image: *elixir
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - mix credo suggest --strict --format=flycheck
-    depends_on:
-      - 'restore cache'
 
   - name: dialyzer check
     image: *elixir
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - mix dialyzer --no-check --quiet --ignore-exit-status --format short
-    depends_on:
-      - 'restore cache'
 
   - name: sobelow check
     image: *elixir
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - mix sobelow
-    depends_on:
-      - 'restore cache'
 
   - name: rebuild cache
     image: *drone_cache
@@ -174,8 +162,3 @@ steps:
       path_style: true
       rebuild: true
       region: us-east-1
-    depends_on:
-      - 'format check'
-      - 'credo check'
-      - 'dialyzer check'
-      - 'sobelow check'