refactor: 중복된 \@Public 어노테이션 제거

src/main/kotlin/roomescape/theme/web/ThemeController.kt

@@ -18,7 +18,6 @@ import roomescape.theme.docs.PublicThemeAPI
 class ThemeController(
     private val themeService: ThemeService,
 ) : PublicThemeAPI {
-    @Public
     @PostMapping("/batch")
     override fun findThemeInfosByIds(
         @Valid @RequestBody request: ThemeIdListRequest
@@ -28,7 +27,6 @@ class ThemeController(
         return ResponseEntity.ok(CommonApiResponse(response))
     }
 
-    @Public
     @GetMapping("/{id}")
     override fun findThemeInfoById(
         @PathVariable id: Long