docs(windows): drop misleading envResult Reads claim from 07-devtools

Phase 07's header comment listed $envResult under Reads, but a body-wide
search shows 07-devtools.ps1 never actually reads $envResult.OpenclawToken
(or any field). This stale claim was inherited from upstream/main and
predates the return-hash trim — the trim brought it from "(OpenclawToken,
DreamAgentKey)" down to "(OpenclawToken)", but the field has zero readers
in this phase regardless.

The Reads section now lists only the variables 07-devtools actually
consumes ($dryRun, $cloudMode, $installDir, $tierConfig, $script:OPENCODE_*).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: yasinBursali

dream-server/installers/windows/phases/07-devtools.ps1

@@ -10,7 +10,6 @@
 #   $dryRun, $cloudMode         -- from orchestrator context
 #   $installDir                 -- from orchestrator context
 #   $tierConfig                 -- from phase 02 (LlmModel, MaxContext, GgufFile)
-#   $envResult                  -- from phase 06 (OpenclawToken)
 #   $script:OPENCODE_*          -- from lib/constants.ps1
 #
 # Writes: