remove initial number for pageLimitation dropdowns

src/server/routes/apiv3/customize-setting.js

@@ -156,10 +156,10 @@ module.exports = (crowi) => {
       isEnabledTimeline: await crowi.configManager.getConfig('crowi', 'customize:isEnabledTimeline'),
       isSavedStatesOfTabChanges: await crowi.configManager.getConfig('crowi', 'customize:isSavedStatesOfTabChanges'),
       isEnabledAttachTitleHeader: await crowi.configManager.getConfig('crowi', 'customize:isEnabledAttachTitleHeader'),
-      pageLimitationS: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationS') || 20,
-      pageLimitationM: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationM') || 10,
-      pageLimitationL: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationL') || 50,
-      pageLimitationXL: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationXL') || 20,
+      pageLimitationS: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationS'),
+      pageLimitationM: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationM'),
+      pageLimitationL: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationL'),
+      pageLimitationXL: await crowi.configManager.getConfig('crowi', 'customize:showPageLimitationXL'),
       isEnabledStaleNotification: await crowi.configManager.getConfig('crowi', 'customize:isEnabledStaleNotification'),
       isAllReplyShown: await crowi.configManager.getConfig('crowi', 'customize:isAllReplyShown'),
       styleName: await crowi.configManager.getConfig('crowi', 'customize:highlightJsStyle'),