Remove _PSOUP

Author: Sainan

docs/Runtime Environment/Global & Base.md

@@ -8,9 +8,6 @@ This page documents the changes & additions to Pluto's runtime environment, whic
 ### `_PVERSION`
 `_PVERSION` is the global to check your current version of Pluto.
 
-### `_PSOUP`
-`_PSOUP` is a global boolean you can access to check linkage with Soup. Always true as of 0.8.0.
-
 ### `os.platform`
 `os.platform` is a global string containing the host platform. Can be "windows", "wasm", "linux", "macos", "android", or "unknown".
 

src/theme/Pluto.tmLanguage.json

@@ -454,7 +454,7 @@
           "name": "constant.language.pluto"
         },
         {
-          "match": "(?<![^.]\\.|:)\\b(_G|_VERSION|_PVERSION|_PSOUP|math\\.(pi|huge|mininteger|maxinteger)|os\\.(platform|arch)|json\\.(null|withnull|withorder))\\b",
+          "match": "(?<![^.]\\.|:)\\b(_G|_VERSION|_PVERSION|math\\.(pi|huge|mininteger|maxinteger)|os\\.(platform|arch)|json\\.(null|withnull|withorder))\\b",
           "name": "constant.language.pluto support.constant.builtin.pluto"
         },
         {