remove downloads from source control (#340)

Author: cs01

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,5 @@
 <!-- add an 'x' in the brackets below -->
-[] I have added an entry to `docs/changelog.md`
+- [] I have added an entry to `docs/changelog.md`
 
 ## Summary of changes
 

docs/changelog.md

@@ -1,5 +1,8 @@
 # gdbgui release history
 
+## development
+* Removed gdbgui binaries from source control. They can now be downloaded as artifacts of [releases](https://github.com/cs01/gdbgui/releases).
+
 ## 0.13.2.1
 * No end user changes. This release builds the gdbgui executables with GitHub actions.