Update src/doc/rustc/src/platform-support/wasm32-unknown-emscripten.md

Co-authored-by: Hood Chatham <roberthoodchatham@gmail.com>

Author: juntyr

src/doc/rustc/src/platform-support/wasm32-unknown-emscripten.md

@@ -43,8 +43,7 @@ If you are only targeting the web and need to access web APIs, the
 ## Requirements
 
 This target is cross-compiled. The Emscripten compiler toolchain `emcc` must be
-installed to link WASM binaries for this target. You can install and activate
-`emcc` using:
+installed to link WASM binaries for this target. You can install `emcc` using:
 
 ```sh
 git clone https://github.com/emscripten-core/emsdk.git --depth 1