Revert "Allow setting a list of SIP codecs for SDP. (#1530)"

This reverts commit ff4d6b6.

Author: davidzhao

.github/workflows/generate.yaml

@@ -33,7 +33,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
-          go-version: ">=1.26"
+          go-version: ">=1.20"
 
       - name: Go mod tidy
         run: go mod tidy

go.mod

@@ -1,6 +1,6 @@
 module github.com/livekit/protocol
 
-go 1.26
+go 1.25.0
 
 require (
 	buf.build/go/protoyaml v0.6.0