Remove dead sources (#1625)

* Remove ZuttoManga, closes #647

* Remove WebtoonsTOP, closes #648

src/en/webtoonstop/build.gradle

@@ -1,10 +0,0 @@
-ext {
-    extName = 'WebtoonsTOP'
-    extClass = '.WebtoonsTOP'
-    themePkg = 'madara'
-    baseUrl = 'https://webtoons.top'
-    overrideVersionCode = 0
-    isNsfw = true
-}
-
-apply from: "$rootDir/common.gradle"

src/en/webtoonstop/src/eu/kanade/tachiyomi/extension/en/webtoonstop/WebtoonsTOP.kt

@@ -1,12 +0,0 @@
-package eu.kanade.tachiyomi.extension.en.webtoonstop
-
-import eu.kanade.tachiyomi.multisrc.madara.Madara
-import java.text.SimpleDateFormat
-import java.util.Locale
-
-class WebtoonsTOP : Madara(
-    "WebtoonsTOP",
-    "https://webtoons.top",
-    "en",
-    dateFormat = SimpleDateFormat("MMM d, yyyy", Locale.US),
-)

src/en/zuttomanga/build.gradle

@@ -1,9 +0,0 @@
-ext {
-    extName = 'ZuttoManga'
-    extClass = '.ZuttoManga'
-    themePkg = 'madara'
-    baseUrl = 'https://zuttomanga.com'
-    overrideVersionCode = 1
-}
-
-apply from: "$rootDir/common.gradle"

src/en/zuttomanga/src/eu/kanade/tachiyomi/extension/en/zuttomanga/ZuttoManga.kt

@@ -1,5 +0,0 @@
-package eu.kanade.tachiyomi.extension.en.zuttomanga
-
-import eu.kanade.tachiyomi.multisrc.madara.Madara
-
-class ZuttoManga : Madara("ZuttoManga", "https://zuttomanga.com", "en")