🗑 Remove conan deploy action

Bintray has been sunset, which means that the old conan repository there
is no longer valid to push to. The `conan-center` repository, which is
suggested as an alternative, works in a drastically different way as it
requires a custom conanfile defined for their manifests.

As a result, this whole workflow and any references have been removed

README.md

@@ -8,7 +8,6 @@
 [![Github Issues](https://img.shields.io/github/issues/bitwizeshift/result.svg)](http://github.com/bitwizeshift/result/issues)
 <br>
 [![Github Releases](https://img.shields.io/github/v/release/bitwizeshift/result.svg?include_prereleases)](https://github.com/bitwizeshift/result/releases)
-[![Bintray Releases](https://api.bintray.com/packages/bitwizeshift/public-conan/Result%3Aresult/images/download.svg) ](https://bintray.com/bitwizeshift/public-conan/Result%3Aresult/_latestVersion)
 <br>
 [![Try online](https://img.shields.io/badge/try-online-blue.svg)](https://godbolt.org/z/nKfqbK)
 

doc/installing.md

@@ -17,13 +17,12 @@ However, if you are using either [`conan`](#conan)  or [`CMake`](#cmake)
 
 ## Conan
 
-This project provides a `conanfile.py` and public hosting on
-[bintray](https://bintray.com/bitwizeshift/public-conan/Result%3Aresult) for packages.
+This project provides a `conanfile.py` for packaging. It is not currently hosted
+as Bintray has been sunset, but this will hopefully be available on conan-center
+before long.
 
-Just follow the instructions in the bintray link for setting up this
-source as a conan repository, and add
-`Result/<the version you want>@result/stable` as a dependency in your
-`conanfile.py`, and you can install this into your project.
+For the time being, this project can be built and packaged locally using `conan`
+which will allow it to be used, or hosted, on any system of your choosing.
 
 ## CMake