Do not rely on conditional module definition

lib/sentry/plug_capture.ex

@@ -1,51 +1,49 @@
-if Code.ensure_loaded?(Plug) do
-  defmodule Sentry.PlugCapture do
-    @moduledoc """
-    Provides basic functionality to handle and send errors occurring within
-    Plug applications, including Phoenix.
-    It is intended for usage with `Sentry.PlugContext`.
-
-    #### Usage
-    In a Phoenix application, it is important to use this module before
-    the Phoenix endpoint itself. It should be added to your endpoint.ex:
-
-
-        defmodule MyApp.Endpoint
-          use Sentry.PlugCapture
-          use Phoenix.Endpoint, otp_app: :my_app
-          # ...
-        end
+defmodule Sentry.PlugCapture do
+  @moduledoc """
+  Provides basic functionality to handle and send errors occurring within
+  Plug applications, including Phoenix.
+  It is intended for usage with `Sentry.PlugContext`.
 
-    In a Plug application, it can be added below your router:
+  #### Usage
+  In a Phoenix application, it is important to use this module before
+  the Phoenix endpoint itself. It should be added to your endpoint.ex:
 
-        defmodule MyApp.PlugRouter do
-          use Plug.Router
-          use Sentry.PlugCapture
-          # ...
-        end
-    """
-    defmacro __using__(_opts) do
-      quote do
-        @before_compile Sentry.PlugCapture
+
+      defmodule MyApp.Endpoint
+        use Sentry.PlugCapture
+        use Phoenix.Endpoint, otp_app: :my_app
+        # ...
       end
+
+  In a Plug application, it can be added below your router:
+
+      defmodule MyApp.PlugRouter do
+        use Plug.Router
+        use Sentry.PlugCapture
+        # ...
+      end
+  """
+  defmacro __using__(_opts) do
+    quote do
+      @before_compile Sentry.PlugCapture
     end
+  end
 
-    defmacro __before_compile__(_) do
-      quote do
-        defoverridable call: 2
-
-        def call(conn, opts) do
-          try do
-            super(conn, opts)
-          rescue
-            e in Plug.Conn.WrapperError ->
-              Sentry.capture_exception(e.reason, stacktrace: e.stack, event_source: :plug)
-              Plug.Conn.WrapperError.reraise(e)
-
-            e ->
-              Sentry.capture_exception(e, stacktrace: __STACKTRACE__, event_source: :plug)
-              :erlang.raise(:error, e, __STACKTRACE__)
-          end
+  defmacro __before_compile__(_) do
+    quote do
+      defoverridable call: 2
+
+      def call(conn, opts) do
+        try do
+          super(conn, opts)
+        rescue
+          e in Plug.Conn.WrapperError ->
+            Sentry.capture_exception(e.reason, stacktrace: e.stack, event_source: :plug)
+            Plug.Conn.WrapperError.reraise(e)
+
+          e ->
+            Sentry.capture_exception(e, stacktrace: __STACKTRACE__, event_source: :plug)
+            :erlang.raise(:error, e, __STACKTRACE__)
         end
       end
     end