Remove dead source code and dependencies

Removed the following dependencies:
SpeziContact
SpeziScheduler
SpeziMockWebService

Removed filler tabs on landing page, leaving only Home.

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

@@ -1,5 +1,5 @@
 {
-  "originHash" : "d2097b02aed2e09776146d22c31b71e71570248079de679a782c846c09d0ae6f",
+  "originHash" : "bee0ebef27ad6762a532584daf21fda010763ebcd3c397d471d2bfbad0b9aa6c",
   "pins" : [
     {
       "identity" : "abseil-cpp-binary",
@@ -190,15 +190,6 @@
         "version" : "1.2.1"
       }
     },
-    {
-      "identity" : "spezicontact",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/StanfordSpezi/SpeziContact.git",
-      "state" : {
-        "revision" : "494b776f8c98d771e4a609a1fb706097dba4c030",
-        "version" : "1.0.0"
-      }
-    },
     {
       "identity" : "spezifirebase",
       "kind" : "remoteSourceControl",
@@ -235,15 +226,6 @@
         "revision" : "9b1713dd9ac14708c0381cf54ad84e13f3780083"
       }
     },
-    {
-      "identity" : "spezimockwebservice",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/StanfordSpezi/SpeziMockWebService.git",
-      "state" : {
-        "revision" : "b18067d3499e630bbd995ef05a296ef8fdd42528",
-        "version" : "1.0.0"
-      }
-    },
     {
       "identity" : "spezionboarding",
       "kind" : "remoteSourceControl",
@@ -262,15 +244,6 @@
         "version" : "1.1.0"
       }
     },
-    {
-      "identity" : "spezischeduler",
-      "kind" : "remoteSourceControl",
-      "location" : "https://github.com/StanfordSpezi/SpeziScheduler.git",
-      "state" : {
-        "revision" : "eed3980f20b01a788720c869010e3fe2fbfcd1fd",
-        "version" : "0.8.2"
-      }
-    },
     {
       "identity" : "spezistorage",
       "kind" : "remoteSourceControl",

ENGAGEHF/Home.swift

@@ -14,10 +14,6 @@ import SwiftUI
 struct HomeView: View {
     enum Tabs: String {
         case home
-        case heart
-        case medications
-        case education
-        case mockUpload
     }
 
     static var accountEnabled: Bool {
@@ -36,30 +32,8 @@ struct HomeView: View {
                 .tabItem {
                     Label("Home", systemImage: "house")
                 }
-            HeartHealth(presentingAccount: $presentingAccount)
-                .tag(Tabs.heart)
-                .tabItem {
-                    Label("Heart Health", systemImage: "heart.square")
-                }
-            Medications(presentingAccount: $presentingAccount)
-                .tag(Tabs.medications)
-                .tabItem {
-                    Label("Medications", systemImage: "pill")
-                }
-            Education(presentingAccount: $presentingAccount)
-                .tag(Tabs.education)
-                .tabItem {
-                    Label("Education", systemImage: "book.pages")
-                }
-            if FeatureFlags.disableFirebase {
-                MockUpload(presentingAccount: $presentingAccount)
-                    .tag(Tabs.mockUpload)
-                    .tabItem {
-                        Label("MOCK_WEB_SERVICE_TAB_TITLE", systemImage: "server.rack")
-                    }
-            }
         }
-            .accessibilityLabel(Text("Tab Bar"))
+
             .sheet(isPresented: $presentingAccount) {
                 AccountSheet()
             }