API modules do not need to setup dependency injection.

Move the implementation to the impl modules.

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/mxc/MxcTools.kt

@@ -8,28 +8,12 @@
 
 package io.element.android.libraries.matrix.api.mxc
 
-import dev.zacsweers.metro.Inject
-
-@Inject
-class MxcTools {
-    /**
-     * Regex to match a Matrix Content (mxc://) URI.
-     *
-     * See: https://spec.matrix.org/v1.8/client-server-api/#matrix-content-mxc-uris
-     */
-    private val mxcRegex = Regex("""^mxc://([^/]+)/([^/]+)$""")
-
+interface MxcTools {
     /**
      * Sanitizes an mxcUri to be used as a relative file path.
      *
      * @param mxcUri the Matrix Content (mxc://) URI of the file.
      * @return the relative file path as "<server-name>/<media-id>" or null if the mxcUri is invalid.
      */
-    fun mxcUri2FilePath(mxcUri: String): String? = mxcRegex.matchEntire(mxcUri)?.let { match ->
-        buildString {
-            append(match.groupValues[1])
-            append("/")
-            append(match.groupValues[2])
-        }
-    }
+    fun mxcUri2FilePath(mxcUri: String): String?
 }