Docs: fix duplicate entries in changelog (#9530)

CHANGELOG.md

@@ -36,28 +36,6 @@ v4.10.0 - October 27, 2017
 * 052c504 Docs: suggest deleting branches after merging PRs (#9449) (Teddy Katz)
 * b31e55a Chore: move internal rules out of lib/ (#9448) (Teddy Katz)
 * a7521e3 Docs: improve examples for multiline-comment-style (#9440) (Teddy Katz)
-* 235c7dd 4.9.0 (ESLint Jenkins)
-* b6f31a9 Build: changelog update for 4.9.0 (ESLint Jenkins)
-* 85388fb Fix: Correct error and test messages to fit config search path (#9428) (Jonathan Pool)
-* 62a323c Fix: Add class options for `lines-around-comment` (fixes #8564) (#8565) (Ed Lee)
-* 8eb4aae New: multiline-comment-style rule (fixes #8320) (#9389) (薛定谔的猫)
-* db41408 Chore: avoid applying eslint-env comments twice (#9278) (Teddy Katz)
-* febb897 Chore: avoid loose equality assertions (#9415) (Teddy Katz)
-* 2247efa Update: Add FunctionExpression to require-jsdoc (fixes #5867) (#9395) (Kai Cataldo)
-* 6791d18 Docs: Corrected noun to verb. (#9438) (Jonathan Pool)
-* b02fbb6 Update: custom messages for no-restricted-* (refs #8400) (Maja Wichrowska)
-* 02732bd Docs: Reorganized to avoid misunderstandings. (#9434) (Jonathan Pool)
-* d9466b8 Docs: Correct time forecast for tests. (#9432) (Jonathan Pool)
-* f7ed84f Docs: Add instruction re home-directory config files (refs #7729) (#9426) (Jonathan Pool)
-* 30d018b Chore: Add Aladdin-ADD & VictorHom to README (#9424) (Kai Cataldo)
-* 2d8a303 Docs: fix examples for prefer-numeric-literals (#9155) (Lutz Lengemann)
-* d7610f5 Docs: Add jquery warning to prefer-destructuring (#9409) (Thomas Grainger)
-* e835dd1 Docs: clarify no-mixed-operators (fixes #8051) (Ruxandra Fediuc)
-* 51360c8 Docs: update block-spacing details (fixes #8743) (#9375) (Victor Hom)
-* 6767857 Update: fix ignored nodes in indent rule when using tabs (fixes #9392) (#9393) (Robin Houston)
-* 37dde77 Chore: Refactor SourceCode#getJSDocComment (#9403) (Kai Cataldo)
-* 9fedd51 Chore: Add missing space in blog post template (#9407) (Kevin Partington)
-* 7654c99 Docs: add installing prerequisites in readme. (#9401) (薛定谔的猫)
 
 v4.9.0 - October 14, 2017