Remove Travis CI configuration

We're using Circle CI for testing a bunch of the spec, and so far it has the advantage of being faster. Also, it's not named the same as me.

We can also remove the Travis CI specific check in generate-matrix-org-assets because Circle CI doesn't touch this.

.travis.yml

@@ -1,16 +0,0 @@
-language: go
-go:
-  - 1.8
-
-sudo: required
-
-# we only need a single git commit
-git:
-  depth: 1
-
-install:
-  - sudo apt-get update
-  - sudo apt-get install python3 python3-dev
-
-script:
-  - ./scripts/test-and-build.sh

scripts/generate-matrix-org-assets

@@ -8,11 +8,8 @@ cd `dirname $0`/..
 
 mkdir -p assets
 
-if [ "$TRAVIS" != "true" ]
+# generate specification/proposals.rst
-then
+./scripts/proposals.py
-    # generate specification/proposals.rst
-    ./scripts/proposals.py
-fi
 
 # generate the spec docs
 ./scripts/gendoc.py -d assets/spec