Remove usage of KObservableField

app/src/main/java/com/topjohnwu/magisk/utils/KObservableField.kt

@@ -1,57 +0,0 @@
-package com.topjohnwu.magisk.utils
-
-import androidx.databinding.Observable
-import androidx.databinding.ObservableField
-import com.topjohnwu.magisk.model.observer.Observer
-import java.io.Serializable
-
-/**
- * Kotlin version of [ObservableField].
- * You can define if wrapped type is Nullable or not.
- * You can use kotlin get/set syntax for value
- *
- * ## Notes
- * This stays final for fuck's sake. Too many things depend on it, so you just cannot go around and
- * change it randomly. Even though you think you're improving the design, you might be fucking this
- * up in unimaginable ways. So DON'T TOUCH THIS.
- *
- * In order to have value-less observer you need - you guessed it - **a fucking [Observer]**!
- */
-class KObservableField<T> : ObservableField<T>, Serializable {
-
-    var value: T
-        set(value) {
-            if (field != value) {
-                field = value
-                notifyChange()
-            }
-        }
-
-    constructor(init: T) {
-        value = init
-    }
-
-    constructor(init: T, vararg dependencies: Observable) : super(*dependencies) {
-        value = init
-    }
-
-    @Deprecated(
-        message = "Needed for data binding, use KObservableField.value syntax from code",
-        replaceWith = ReplaceWith("value")
-    )
-    override fun get(): T {
-        return value
-    }
-
-    @Deprecated(
-        message = "Needed for data binding, use KObservableField.value = ... syntax from code",
-        replaceWith = ReplaceWith("value = newValue")
-    )
-    override fun set(newValue: T) {
-        value = newValue
-    }
-
-    override fun toString(): String {
-        return "KObservableField(value=$value)"
-    }
-}