Remove deprecated `bundle viz` and `bundle inject` commands #6969

Job	Run time
Realworld Bundler on Ubuntu (ruby-3.2)	2m 0s
Realworld Bundler against system Rubygems (ruby-3.3)	2m 3s
Realworld Bundler against system Rubygems (ruby-3.2)	2m 5s
Realworld Bundler against system Rubygems (ruby-3.4)	1m 54s
Realworld Bundler on Ubuntu (ruby-3.4)	1m 57s
Realworld Bundler on macOS (ruby-3.3)	1m 16s
Realworld Bundler on macOS (ruby-3.2)	1m 12s
Realworld Bundler on macOS (ruby-3.4)	1m 41s
Realworld Bundler on Ubuntu (ruby-3.3)	1m 58s
Tapioca	1m 13s
Check unused cassettes	13s
All realworld-bundler jobs pass	5s
	17m 37s

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