chore: Revert travis configuration

Revert #2644. We have to manually validate the screenshots, but master is the reference branch for screenshots, so we need screenshots on this branch. Perhaps we could optimize this by retrieving screenshots from the branch instead of restarting the job from master...

.travis.yml

@@ -95,7 +95,6 @@ jobs:
       if: commit_message =~ /^((?!\[only argos\]).)*$/  # skipped if commit message contains "[only argos]"
     - name: '[Argos] Create desktop screenshots'
       stage: 'Screenshots - Create'
-      if: branch != master
       script: |
         if [[ "${PR_TITLE}" != *"[skip argos]"* ]]; then
           mkdir ./screenshots
@@ -114,7 +113,6 @@ jobs:
             - ./screenshots
     - name: '[Argos] Create mobile screenshots'
       stage: 'Screenshots - Create'
-      if: branch != master
       script: |
         if [[ "${PR_TITLE}" != *"[skip argos]"* ]]; then
           mkdir ./screenshots
@@ -133,7 +131,6 @@ jobs:
             - ./screenshots
     - name: '[Argos] Create kss screenshots'
       stage: 'Screenshots - Create'
-      if: branch != master
       script: |
         if [[ "${PR_TITLE}" != *"[skip argos]"* ]]; then
           mkdir ./screenshots
@@ -152,7 +149,6 @@ jobs:
             - ./screenshots
     - name: '[Argos] Upload all screenshots'
       stage: 'Screenshots - Upload'
-      if: branch != master
       script: |
         if [[ "${PR_TITLE}" != *"[skip argos]"* ]]; then
           yarn argos:upload --parallel screenshots/reactDesktop/ --token $ARGOS_TOKEN  --parallel-total 3 --parallel-nonce $TRAVIS_BUILD_ID --ignore ''
@@ -171,6 +167,7 @@ jobs:
     - name: 'Deploy'
       stage: 'Deploy'
       script: 'true'
+      if: commit_message =~ /^((?!\[only argos\]).)*$/  # skipped if commit message contains "[only argos]"
       workspaces:
         use:
           - sprite-palette-binaries