Remove testWritesThenCloseThenReopenWithVars (#891)

This test started failing while testing
subconsciousnetwork/noosphere#623, leading us to
question why it ever passed in the first place. Due to Swift compiler
trivia the deinit for `Noosphere` is not guaranteed to be called at the
time we overwrite the variable, meaning two instances of `Noosphere`
co-exist pointing at the same data. We should not ever be trying to open
multiple instances of `Noosphere` pointing at the same database.

After team discussion we decided to drop this test case and make this an
explicit failure case on the Noosphere side.

xcode/Subconscious/SubconsciousTests/Tests_Sphere.swift

@@ -448,76 +448,6 @@ final class Tests_Sphere: XCTestCase {
         }
     }
 
-    func testWritesThenCloseThenReopenWithVars() async throws {
-        let base = UUID()
-
-        let globalStoragePath = try createTmpDir(path: "\(base)/noosphere")
-            .path()
-
-        let sphereStoragePath = try createTmpDir(path: "\(base)/sphere")
-            .path()
-
-        var noosphere = try Noosphere(
-            globalStoragePath: globalStoragePath,
-            sphereStoragePath: sphereStoragePath
-        )
-
-        let sphereReceipt = try await noosphere.createSphere(
-            ownerKeyName: "bob"
-        )
-
-        let sphereIdentity = sphereReceipt.identity
-
-        var sphere = try Sphere(
-            noosphere: noosphere,
-            identity: sphereReceipt.identity
-        )
-
-        let versionA0 = try await sphere.version()
-
-        let body = try "Test content".toData().unwrap()
-        let contentType = "text/subtext"
-        try await sphere.write(
-            slug: Slug("a")!,
-            contentType: contentType,
-            body: body
-        )
-
-        let versionA1 = try await sphere.save()
-
-        try await sphere.write(
-            slug: Slug("b")!,
-            contentType: contentType,
-            body: body
-        )
-        try await sphere.write(
-            slug: Slug("c")!,
-            contentType: contentType,
-            body: body
-        )
-        let versionA2 = try await sphere.save()
-
-        let versionAN = try await sphere.version()
-
-        XCTAssertNotEqual(versionA0, versionAN)
-        XCTAssertNotEqual(versionA1, versionAN)
-        XCTAssertEqual(versionA2, versionAN)
-
-        // Overwrite var with new instance
-        noosphere = try Noosphere(
-            globalStoragePath: globalStoragePath,
-            sphereStoragePath: sphereStoragePath
-        )
-        // Overwrite sphere with new sphere
-        sphere = try Sphere(
-            noosphere: noosphere,
-            identity: sphereIdentity
-        )
-        let versionB0 = try await sphere.version()
-
-        XCTAssertEqual(versionB0, versionAN)
-    }
-
     func testPetnameRoundtrip() async throws {
         let base = UUID()