Partially revert "Use GL_NEAREST when possible without degrading quality"

The changes to GL_NEAREST for overlay textures and disabling alpha blending in SDL renderer are left intact.

This reverts commit 0f49dca4c0.

app/streaming/video/ffmpeg-renderers/sdlvid.cpp

@@ -576,11 +576,6 @@ ReadbackRetry:
     // Ensure the viewport is set to the desired video region
     SDL_RenderSetViewport(m_Renderer, &dst);
 
-    // Use nearest pixel sampling if the video region size is a multiple of the frame size
-    SDL_SetTextureScaleMode(m_Texture,
-                            dst.w % frame->width == 0 && dst.h % frame->height == 0 ?
-                                SDL_ScaleModeNearest : SDL_ScaleModeLinear);
-
     // Draw the video content itself
     SDL_RenderCopy(m_Renderer, m_Texture, nullptr, nullptr);