Remove unnecessary -t from Makefile

Based on the patch made to the Makefile done for OpenBSD:
<https://marc.info/?l=openbsd-ports&m=171628246015597&w=2>

Makefile

@@ -50,18 +50,18 @@ htmldoc:
 	$(ASCIIDOCTOR) $(HTMLFLAGS) $(srcdir)/docs/rink-dates.5.adoc
 
 installbin:
-	$(INSTALL) -Dm 0755 target/release/rink -t $(bindir)
+	$(INSTALL) -Dm 0755 target/release/rink $(bindir)
 
 installman:
-	$(INSTALL) -Dm 0644 build/rink.1 -t $(man1dir)
-	$(INSTALL) -Dm 0644 build/rink.5 -t $(man5dir)
-	$(INSTALL) -Dm 0644 build/rink.7 -t $(man7dir)
-	$(INSTALL) -Dm 0644 build/rink-defs.5 -t $(man5dir)
-	$(INSTALL) -Dm 0644 build/rink-dates.5 -t $(man5dir)
+	$(INSTALL) -Dm 0644 build/rink.1 $(man1dir)
+	$(INSTALL) -Dm 0644 build/rink.5 $(man5dir)
+	$(INSTALL) -Dm 0644 build/rink.7 $(man7dir)
+	$(INSTALL) -Dm 0644 build/rink-defs.5 $(man5dir)
+	$(INSTALL) -Dm 0644 build/rink-dates.5 $(man5dir)
 
 installfiles:
-	$(INSTALL) -Dm 0644 $(srcdir)/core/definitions.units -t $(datadir)/rink
-	$(INSTALL) -Dm 0644 $(srcdir)/core/datepatterns.txt -t $(datadir)/rink
-	$(INSTALL) -Dm 0644 $(srcdir)/core/currency.units -t $(datadir)/rink
+	$(INSTALL) -Dm 0644 $(srcdir)/core/definitions.units $(datadir)/rink
+	$(INSTALL) -Dm 0644 $(srcdir)/core/datepatterns.txt $(datadir)/rink
+	$(INSTALL) -Dm 0644 $(srcdir)/core/currency.units $(datadir)/rink
 
 install: installbin installman installfiles