Instructions
Launch "Minecraft" and click the "Options" button at the bottom of the main menu.
Click the "Resource Packs" button on the options screen to view a list of texture packs.
Click the "Open resource packs folder" button on the selection screen.
Right-click a texture pack from the folder and select "Delete" from the context menu.
Click "Yes" to confirm that you want to delete the selected texture pack.
Return to the game and click "Done."