[Sony Xperia Miro, Tipo (Dual), J, E] De5iant:
This some apk's and other files which can be removed from the system for longer battery life and little performance increase and more space in /system folder :)

system/app/AccessoryKeyDispatcher.apk

system/app/bootinfo.apk

system/app/CredentialManagerService.apk

system/app/DrmDialogs.apk

system/app/DrmProvider.apk

system/app/EventStream.apk

system/app/EventStreamPluginFacebook.apk

system/app/EventStreamPluginTwitter.apk

system/app/Exchange.apk

system/app/FBAndroid.apk

system/app/FBCalendarSync.apk

system/app/FBMediaDiscovery.apk

system/app/FBMusicLike.apk

system/app/FBNotificationPublisher.apk

system/app/FBSetupwizard.apk

system/app/FeedWidget.apk

system/app/GenieWidget.apk

system/app/GoogleTTS.apk

system/app/GoogleFeedback.apk

system/app/helpappics.apk

system/app/InputDevices.apk

system/app/Initial-boot-setup.apk

system/app/KeyChain.apk

system/app/MediaUploader.apk

system/app/OemCryptoReceiver.apk

system/app/OMAClientProvisioning.apk

system/app/OmaDatasyncService.apk

system/app/OmaDownload.apk

system/app/OmaV1AgentDownloadServices.apk

system/app/PartnerBookmarksProvider.apk

system/app/PlusOne.apk

system/app/PostViewer.apk

system/app/ReadyToRun.apk

system/app/RetailDemo.apk

system/app/SecureClockJava.apk

system/app/SEMCFacebookProxy.apk

system/app/SemcVideoEdit.apk

system/app/smartcontacts.apk

system/app/SocialEngineCore.apk

system/app/SocialEngineFacebookPlugin.apk

system/app/SocialEnginePicasaPlugin.apk

system/app/SocialPane-Apps.apk

system/app/SocialPane-FriendsWidget.apk

system/app/SocialPane-StatusWidget.apk

system/app/Sync.apk

system/app/SystemExUI.apk

system/app/Talk.apk

system/app/talkback.apk

system/app/TimescapeSpline.apk

system/app/UpdateCenter.apk

system/app/UseragentProvider.apk

system/app/UserDictionaryProvider.apk

system/app/VoiceSearchStub.apk

system/app/Velvet.apk

system/app/VerifyCertificatesDummyAppApplication.apk

system/app/VerifyCertificatesDummyAppMedia.apk

system/app/VerifyCertificatesDummyAppPlatform.apk

system/app/VerifyCertificatesDummyAppShared.apk

system/app/WapPush.apk

system/app/WAPPushManager.apk

system/etc/product/applications/EarthLiveWallpaper.apk

system/etc/product/applications/OfficeSuitePro_SE_Viewer.apk

system/etc/product/applications/PlayNowClientArvato.apk

system/etc/product/applications/Twitter.apk

system/etc/product/applications/trackid.apk

system/etc/customization/content/com/sonyericsson/r2r (folder)

system/etc/cdrom_install.iso

system/etc/dop.iso

system/bin/ATFWD-daemon

system/bin/bugreport

system/bin/cnd

system/bin/cplog

system/bin/debuggerd

system/bin/diag_socket_log

system/bin/diag_uart_log

system/bin/dumpstack

system/bin/dumpstate

system/bin/dumpsys

system/bin/DumpSystemInfo

system/bin/klogd

system/bin/log

system/bin/logcat

system/bin/loggerlauncher

system/bin/qosmgr

system/bin/vmstat

system/bin/widevinetest_rpc

system/bin/wl

system/framework/AsahiSignature.jar

system/framework/com.google.widevine.software.drm.jar

system/framework/com.sonyericsson.media.infinite.extension_1.jar

system/framework/com.sonyericsson.music.like_1_impl.jar

system/etc/permissions/com.google.widevine.software.drm.xml

system/etc/permissions/com.sonyericsson.media.infinite.extension_1.xml

system/etc/permissions/com.sonyericsson.music.like_1.xml

system/etc/permissions/com.sonyericsson.security.asahi.AsahiSignature.xml

system/lib/libAsahiJniNative.so

system/lib/libasahi_playnow_red_brown.so

system/lib/libcredential-manager-service.so

system/lib/libfrsdk.so

system/lib/libgcomm_jni.so

system/lib/libgoogle_endpointer_jni.so

system/lib/libgoogle_recognizer_jni.so

system/lib/libJNISecureClock.so

system/lib/libpatts_engine_jni_api.so

system/lib/libsrec_jni.so

system/lib/libttspico

system/lib/libvideochat_jni.sp

system/lib/libvideochat_stabilize.so

system/lib/libvideoeditor_core

system/lib/libvideoeditor_jni.so

system/lib/libvideoeditor_osal.so

system/lib/libvideoeditor_videofilters.so

system/lib/libvideoeditorplayer.so

system/lib/libwidevine.so

system/lib/libWVphoneAPI.so

system/media/video (folder)

there are flashable zip that remove all files of the list:

View attachment 4085121

p.s. At me these files are removed ~2 months and there were no some errors or random reboots

p.p.s. don't forget about the possibility of making backup