RFR: 8368093: Remove Stream::createPseudoHeaders

Mon Dec 1 17:57:58 UTC 2025

The method was copied to Utils, and all uses were updated. Remove the method now.

The methods are still [identical](https://github.com/openjdk/jdk/blob/6cb1c8f9cfcb797af788ca8fb490f388cc68f525/src/java.net.http/share/classes/jdk/internal/net/http/common/Utils.java#L1326-L1354). Tests continue to pass.

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Commit messages:
 - Remove Stream::createPseudoHeaders

Changes: https://git.openjdk.org/jdk/pull/28583/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28583&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8368093
  Stats: 31 lines in 1 file changed: 0 ins; 31 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28583.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28583/head:pull/28583

PR: https://git.openjdk.org/jdk/pull/28583