Remove travis config

.travis.yml

@@ -1,23 +0,0 @@
-language: cpp
-dist: trusty
-sudo: false
-
-os: linux
-
-git:
-  depth: 1
-
-env:
-  global:
-    - secure: |-
-        a1eovNn4uol9won7ghr67eD3/59oeESN+G9bWE+ecI1V6yRseG9whniGhIpC/YfMW/Qz5I
-        5sxSmFjaw9bxCISNwUIrL1O5x2AmRYTnFcXk4dFsUvlZg+WeF/aKyBYCNRM8C2ndbBmtAO
-        o1F2EwFbiso0EmtzhAPs19ujiVxkLn4=
-
-matrix:
-  include:
-    - env: BUILD=Doc
-      sudo: required
-
-script:
-  - support/travis-build.py

README.rst

@@ -10,9 +10,6 @@
 .. image:: https://github.com/fmtlib/fmt/workflows/windows/badge.svg
    :target: https://github.com/fmtlib/fmt/actions?query=workflow%3Awindows
 
-.. image:: https://travis-ci.org/fmtlib/fmt.png?branch=master
-   :target: https://travis-ci.org/fmtlib/fmt
-
 .. image:: https://ci.appveyor.com/api/projects/status/ehjkiefde6gucy1v
    :target: https://ci.appveyor.com/project/vitaut/fmt
 

support/build-docs.py

@@ -12,13 +12,6 @@ def rmtree_if_exists(dir):
         if e.errno == errno.ENOENT:
             pass
 
-def makedirs_if_not_exist(dir):
-    try:
-        os.makedirs(dir)
-    except OSError as e:
-        if e.errno != errno.EEXIST:
-            raise
-
 def install_dependencies():
     branch = os.environ['GITHUB_REF']
     if branch != 'refs/heads/doc':