codecov: adjust codecov config and remove CircleCI coverage job

Let's keep the only coverage job, so that CircleCI and GithubAction
coverage do not conflict with each other.

Also, let's do not require all other tests to pass to report the
coverage.

.circleci/config.yml

@@ -1,6 +1,4 @@
 version: 2.1
-orbs:
-  codecov: codecov/codecov@1.0.5
 
 executors:
   go1_15:
@@ -62,20 +60,6 @@ jobs:
       - gomod
       - run: go test -v -race ./...
 
-  test_cover:
-    working_directory: /go/src/github.com/nspcc-dev/neo-go
-    executor: go1_17
-    environment:
-        CGO_ENABLED: 0
-    steps:
-      - checkout
-      - run: git submodule sync
-      - run: git submodule update --init
-      - gomod
-      - run: go test -v ./... -coverprofile=coverage.txt -covermode=atomic -coverpkg=./pkg...,./cli/...
-      - codecov/upload:
-          file: coverage.txt
-
   build_cli:
     working_directory: /go/src/github.com/nspcc-dev/neo-go
     executor: go1_17
@@ -125,10 +109,6 @@ workflows:
           filters:
             tags:
               only: v/[0-9]+\.[0-9]+\.[0-9]+/
-      - test_cover:
-          filters:
-            tags:
-              only: v/[0-9]+\.[0-9]+\.[0-9]+/
       - build_cli:
           filters:
             tags:

codecov.yml

@@ -1,11 +1,3 @@
 codecov:
   require_ci_to_pass: no # We have several CI jobs that upload codecov results,
                          # and sometimes some of them may fail, it's OK.
-coverage:
-  status:
-    project:
-      default: # This can be anything, but it needs to exist as the name
-        if_ci_failed: error #success, failure, error, ignore
-        only_pulls: false
-comment:
-  after_n_builds: 1