Revert "feature(subtitles): add frog_subtitles addon"

This reverts commit d3eff4e006.

README.md

@@ -8,13 +8,6 @@ Point-and-click adventure game developed using Escoria framework and Godot engin
 2) Clone `escoria-demo-game` repo (develop branch)
 3) Create `gymkhana/addons/escoria-core` symlink pointing to `escoria-demo-game/addons/escoria-core`
 
-### Frog Subtitles
-
-Frog Subtitles is a C# plugin which requires some extra steps:
-
-1) Use Godot .Net version
-2) Download .Net SDK v8+ (Ubuntu 24.04: `sudo apt install dotnet-sdk-8.0`)
-3) Build C# solution in Godot: Project -> Tools -> C# -> Create C# solution
 
 ## Video export.
 - 1280 x 720 | 25fps