remove unused packages

Shimmer package was added to package dependencies in #56 but Shimmer.swift in Components was used instead.

damus.xcodeproj/project.pbxproj

@@ -754,7 +754,6 @@
 				4CE6DF1027F7A2B300C66700 /* XCRemoteSwiftPackageReference "Starscream" */,
 				4C64987F286E0EE300EAE2B3 /* XCRemoteSwiftPackageReference "secp256k1" */,
 				4C06670228FC7EC500038D2A /* XCRemoteSwiftPackageReference "Kingfisher" */,
-				3169CAE9294FCABA00EE4006 /* XCRemoteSwiftPackageReference "Shimmer" */,
 				6C7DE41D2955169800E66263 /* XCRemoteSwiftPackageReference "Vault" */,
 			);
 			productRefGroup = 4CE6DEE427F7A08100C66700 /* Products */;
@@ -1294,14 +1293,6 @@
 /* End XCConfigurationList section */
 
 /* Begin XCRemoteSwiftPackageReference section */
-		3169CAE9294FCABA00EE4006 /* XCRemoteSwiftPackageReference "Shimmer" */ = {
-			isa = XCRemoteSwiftPackageReference;
-			repositoryURL = "https://github.com/joshuajhomann/Shimmer";
-			requirement = {
-				branch = master;
-				kind = branch;
-			};
-		};
 		4C06670228FC7EC500038D2A /* XCRemoteSwiftPackageReference "Kingfisher" */ = {
 			isa = XCRemoteSwiftPackageReference;
 			repositoryURL = "https://github.com/onevcat/Kingfisher";

damus.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -17,15 +17,6 @@
         "revision" : "40b4b38b3b1c83f7088c76189a742870e0ca06a9"
       }
     },
-    {
-      "identity" : "shimmer",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/joshuajhomann/Shimmer",
-      "state" : {
-        "branch" : "master",
-        "revision" : "2fde687b3f1d9c5409c53da095d3686361e41343"
-      }
-    },
     {
       "identity" : "starscream",
       "kind" : "remoteSourceControl",