[CI] remove codecov step (elastic#20102)

Author: v1v

.ci/scripts/report-codecov.sh

@@ -388,13 +388,4 @@ notifications:
     on_failure: always
     on_pull_requests: false
     rooms:
-      secure: "e25J5puEA31dOooTI4T+K+zrTs8XeWIGq2cgmiPt9u/g7eqWeQj1UJnVsr8GOu1RPDyuJZJHXqfrvuOYJTdHzXbwjD0JTbwwVVZMkkZW2SWZHG46HCXPiucjWXEr3hXJKBJDDpIx6VxrN7r17dejv1biQ8QuEFZfiB1H8kbH/ho="
-
-after_success:
-  # Copy full.cov to coverage.txt because codecov.io requires this file
-  - test -f auditbeat/build/coverage/full.cov && bash <(curl -s https://codecov.io/bash) -f auditbeat/build/coverage/full.cov
-  - test -f filebeat/build/coverage/full.cov && bash <(curl -s https://codecov.io/bash) -f filebeat/build/coverage/full.cov
-  - test -f heartbeat/build/coverage/full.cov && bash <(curl -s https://codecov.io/bash) -f heartbeat/build/coverage/full.cov
-  - test -f libbeat/build/coverage/full.cov && bash <(curl -s https://codecov.io/bash) -f libbeat/build/coverage/full.cov
-  - test -f metricbeat/build/coverage/full.cov && bash <(curl -s https://codecov.io/bash) -f metricbeat/build/coverage/full.cov
-  - test -f packetbeat/build/coverage/full.cov && bash <(curl -s https://codecov.io/bash) -f packetbeat/build/coverage/full.cov
+      secure: "e25J5puEA31dOooTI4T+K+zrTs8XeWIGq2cgmiPt9u/g7eqWeQj1UJnVsr8GOu1RPDyuJZJHXqfrvuOYJTdHzXbwjD0JTbwwVVZMkkZW2SWZHG46HCXPiucjWXEr3hXJKBJDDpIx6VxrN7r17dejv1biQ8QuEFZfiB1H8kbH/ho="

.travis.yml

@@ -938,9 +938,6 @@ def withBeatsEnv(Map args = [:], Closure body) {
         if (archive) {
           archiveTestOutput(testResults: '**/build/TEST*.xml', artifacts: '**/build/TEST*.out')
         }
-        catchError(buildResult: 'SUCCESS', stageResult: 'UNSTABLE') {
-          sh(label: 'Report to Codecov', script: '.ci/scripts/report-codecov.sh auditbeat filebeat heartbeat journalbeat libbeat metricbeat packetbeat winlogbeat')
-        }
       }
     }
   }