Remove changelog for MIPS hard/soft float documentation.

Author: Alexhuszagh

.changes/1028.json

@@ -25,10 +25,6 @@
         "type": "changed",
         "breaking": true
     },
-    {
-        "description": "document whether MIPS musl targets are hard or soft float.",
-        "type": "internal"
-    },
     {
         "description": "convert mips-unknown-linux-musl and mipsel-unknown-linux-musl to use the mips32r2 architecture, identical to the rust targets.",
         "type": "changed",