GRDB 7: Remove DatabasePool.concurrentRead #1231

Job	Run time
SQLCipher3 (Xcode_16.1.app, macOS-14, Xcode 16.1)	5s
SQLCipher3 (Xcode_16.1.app, macOS-14, Xcode 16.1)	7m 11s
SQLCipher3 (Xcode_16.1.app, macOS-14, Xcode 16.1)	7m 3s
SQLCipher4 (Xcode_16.1.app, macOS-14, Xcode 16.1)	13m 28s
SQLCipher4 (Xcode_16.1.app, macOS-14, Xcode 16.1)	13m 28s
SQLCipher4 (Xcode_16.1.app, macOS-14, Xcode 16.1)	13m 28s
XCFramework (Xcode_16.1.app, macOS-14, Xcode 16.1)	11m 12s
XCFramework (Xcode_16.1.app, macOS-14, Xcode 16.1)	11m 12s
XCFramework (Xcode_16.1.app, macOS-14, Xcode 16.1)	11m 12s
CustomSQLite (Xcode_16.1.app, macOS-14, Xcode 16.1)	5m 12s
CustomSQLite (Xcode_16.1.app, macOS-14, Xcode 16.1)	5m 12s
CustomSQLite (Xcode_16.1.app, macOS-14, Xcode 16.1)	5m 12s
Framework (Xcode_16.1.app, macOS-14, platform=macOS, macOS)	4m 48s
Framework (Xcode_16.1.app, macOS-14, platform=macOS, macOS)	4m 48s
Framework (Xcode_16.1.app, macOS-14, platform=macOS, macOS)	4m 48s
Framework (Xcode_16.1.app, macOS-14, OS=18.1,name=iPhone 15 Pro, iOS)	10m 28s
Framework (Xcode_16.1.app, macOS-14, OS=18.1,name=iPhone 15 Pro, iOS)	10m 28s
Framework (Xcode_16.1.app, macOS-14, OS=18.1,name=iPhone 15 Pro, iOS)	10m 28s
Framework (Xcode_16.1.app, macOS-14, OS=18.0,name=Apple TV, tvOS)	4m 18s
Framework (Xcode_16.1.app, macOS-14, OS=18.0,name=Apple TV, tvOS)	4m 18s
Framework (Xcode_16.1.app, macOS-14, OS=18.0,name=Apple TV, tvOS)	4m 18s
SPM (Xcode_16.1.app, macOS-14, Xcode 16.1)	14m 3s
SPM (Xcode_16.1.app, macOS-14, Xcode 16.1)	14m 3s
SPM (Xcode_16.1.app, macOS-14, Xcode 16.1)	14m 3s
	3h 24m 46s

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