chore: drop travis mentioning in docs and comments

contrib/containers/deploy/Dockerfile

@@ -1,6 +1,6 @@
 FROM phusion/baseimage:focal-1.0.0
 LABEL maintainer="Dash Developers <dev@dash.org>"
-LABEL description="Dockerised DashCore, built from Travis"
+LABEL description="Dockerised DashCore, built from CI"
 
 ARG USER_ID
 ARG GROUP_ID

contrib/containers/deploy/README.md

@@ -1,8 +1,8 @@
-This docker image is built and pushed from travis. It does not contain any default configs or any
+This docker image is built and pushed from CI. It does not contain any default configs or any
 special startup scripts. This is to keep it simple and to not copy too much logic from the
 official/supported Docker Images found at https://hub.docker.com/r/dashpay/dashd/
 
 The image is mostly used for devops purposes, e.g. for testnet/devnet deployments. Regular users
 should use the official images instead of this one.
 
-**NOTE: Please update the image description at https://hub.docker.com/r/dashpay/dashd-develop/ when changing the above text**
+**NOTE: Please update the image description at https://hub.docker.com/r/dashpay/dashd-develop/ when changing the above text**

contrib/verify-commits/verify-commits.py

@@ -102,7 +102,7 @@ def main():
     # Iterate through commits
     while True:
 
-        # Log a message to prevent Travis from timing out
+        # Log a message to prevent CI from timing out
         logging.debug("verify-commits: [in-progress] processing commit {}".format(current_commit[:8]))
 
         if current_commit == verified_root: